New System for BF3

Hello all

I was just tryin to upgrade my computer but found out that mine that I have now is alittle out of date runs BF3 ok but you know how its is came into some extra cash thought I would but somthing together around my new card 6950 and allow for upgrading later. But the issue is on the spec sheet on the 6950 requires two 12v pluges at 75w 6pin connecters WOW so my question is what PSU would be good for this but not overkill.Tryin not to spend all of my budget LOL please help thanks.Oh yea also my wife got me 27"LED Samsung monitor.

G.SKILL Ripjaws Series 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory
Item #:N82E16820231315
ASUS 24X DVD Burner - Bulk Black SATA Model DRW-24B1ST/BLK/B/AS
Item #:N82E16827135204
OCZ Vertex 3 VTX3-25SAT3-60G 2.5" MLC Internal Solid State Drive (SSD)
Item #:N82E16820227737
ASUS Sabertooth 990FX ATX AMD Motherboard with UEFI BIOS
Item #:N82E1681313173
COOLER MASTER HAF 922 RC-922M-KKN1-GP Black Computer Case
Item #:N82E16811119197
AMD Phenom II X6 1100T Black Edition 3.3GHz, 3.7GHz Turbo Socket AM3 Six-Core Desktop Processor
Item #:N82E168191039
CORSAIR Enthusiast Series TX850 V2 850W High Performance Power Supply
Item #:N82E16817139022
Sapphire Radeon HD6950 2GB Dirt3 Edition this was already bought for me from my wife
lol